XU Chang-shan, GONG Yan, XIANG Yang, CHEN Bo, CAO Jian-lin. Effects of transfer function of profilometer on roughness measurement of ultra-smooth surface[J]. Editorial Office of Optics and Precision Engineering, 2002,(1): 45-49
XU Chang-shan, GONG Yan, XIANG Yang, CHEN Bo, CAO Jian-lin. Effects of transfer function of profilometer on roughness measurement of ultra-smooth surface[J]. Editorial Office of Optics and Precision Engineering, 2002,(1): 45-49DOI:
Root-mean-square roughness is one of the most important figures that is used to characterize the ultra-smooth surfaces. Many experimental results show that different types of profilometers usually give different results
which make it difficult to compare them. In this paper
the effects of the transfer function of a profilometer on the roughness measurement of ultra-smooth surfaces are analyzed based on linear system theory and simulated with the discrete Fourier transformation method. The results show that because of the limited bandpass of the profilometer
the measured root-mean-square roughness is always less than the real roughness of the surfaces.
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references
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